<?php

namespace App\Http\Controllers\Admin;

use App\Http\Controllers\Controller;
use App\Models\Siswa;
use App\Models\Kelas;
use App\Models\User;
use App\Models\TahunAjaran;
use App\Imports\SiswaImport;
use App\Exports\SiswaExport;
use Maatwebsite\Excel\Facades\Excel;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Hash;
use Illuminate\Support\Facades\Log;

class SiswaController extends Controller
{
    public function index(Request $request)
    {
        $kelasId = $request->kelas_id;
        $tahunAjaranId = $request->tahun_ajaran_id;

        $tahunAjaranList = TahunAjaran::where('status', 'aktif')->orderBy('tahun', 'desc')->get();

        $query = Siswa::with(['kelas', 'tahunAjaran', 'user']);

        if ($tahunAjaranId) {
            $query->where('tahun_ajaran_id', $tahunAjaranId);
        }

        if ($kelasId) {
            $query->where('kelas_id', $kelasId);
        }

        $data = $query->paginate(15);
        $kelasList = Kelas::all();

        return view('admin.siswa.index', compact('data', 'kelasList', 'tahunAjaranList'))
            ->with('success', session('success'))
            ->withErrors(session('error'));
    }

    public function create()
    {
        $kelasList = Kelas::all();
        $tahunAjaranList = TahunAjaran::orderBy('tahun', 'desc')->get();
        return view('admin.siswa.create', compact('kelasList', 'tahunAjaranList'));
    }

    public function store(Request $request)
    {
        try {
            $tahunAjaran = TahunAjaran::where('status', 'aktif')->first();

            $request->validate([
                'nisn' => 'required|unique:siswa,nisn',
                'nama' => 'required',
                'email' => 'required|email|unique:users,email',
                'kelas_id' => 'required|exists:kelas,id',
                'alamat' => 'nullable',
                'jenis_kelamin' => 'required|in:L,P',
            ]);

            $user = User::create([
                'name' => $request->nama,
                'email' => $request->email,
                'password' => Hash::make('defaultpassword'),
                'role' => 'siswa',
                'is_active' => 1,
            ]);

            Siswa::create([
                'user_id' => $user->id,
                'nisn' => $request->nisn,
                'nama' => $request->nama,
                'kelas_id' => $request->kelas_id,
                'alamat' => $request->alamat,
                'jenis_kelamin' => $request->jenis_kelamin,
                'tahun_ajaran_id' => $tahunAjaran->id ?? null,
            ]);

            return redirect()->route('admin.siswa.index')->with('success', 'Data siswa berhasil ditambahkan');
        } catch (\Exception $e) {
            Log::error('Gagal menambahkan siswa: ' . $e->getMessage());
            return back()->withInput()->withErrors('Terjadi kesalahan saat menambahkan siswa.');
        }
    }

    public function edit($id)
    {
        $siswa = Siswa::with(['user', 'kelas', 'tahunAjaran'])->findOrFail($id);
        $kelasList = Kelas::all();
        $tahunAjaranList = TahunAjaran::all();
        return view('admin.siswa.edit', compact('siswa', 'kelasList', 'tahunAjaranList'));
    }

    public function update(Request $request, $id)
    {
        try {
            $siswa = Siswa::with('user')->findOrFail($id);
            $user = $siswa->user;

            $request->validate([
                'nisn' => 'required|unique:siswa,nisn,' . $siswa->id,
                'nama' => 'required',
                'email' => 'required|email|unique:users,email,' . $user->id,
                'password' => 'nullable|min:6',
                'alamat' => 'nullable',
                'jenis_kelamin' => 'required|in:L,P',
                'kelas_id' => 'required|exists:kelas,id',
                'tahun_ajaran_id' => 'required|exists:tahun_ajaran,id',
            ]);

            $user->name = $request->nama;
            $user->email = $request->email;
            if ($request->filled('password')) {
                $user->password = Hash::make($request->password);
            }
            $user->save();

            $siswa->update([
                'nisn' => $request->nisn,
                'nama' => $request->nama,
                'alamat' => $request->alamat,
                'jenis_kelamin' => $request->jenis_kelamin,
                'kelas_id' => $request->kelas_id,
                'tahun_ajaran_id' => $request->tahun_ajaran_id,
            ]);

            return redirect()->route('admin.siswa.index')->with('success', 'Data siswa berhasil diperbarui');
        } catch (\Exception $e) {
            Log::error('Gagal mengupdate siswa: ' . $e->getMessage());
            return back()->withInput()->withErrors('Terjadi kesalahan saat memperbarui data siswa.');
        }
    }

    public function destroy($id)
    {
        try {
            $siswa = Siswa::findOrFail($id);
            $user = $siswa->user;

            $siswa->delete();
            if ($user) {
                $user->delete();
            }

            return back()->with('success', 'Data siswa berhasil dihapus');
        } catch (\Exception $e) {
            Log::error('Gagal menghapus siswa: ' . $e->getMessage());
            return back()->withErrors('Terjadi kesalahan saat menghapus data siswa.');
        }
    }

    public function import(Request $request)
    {
        try {
            $request->validate([
                'file' => 'required|mimes:xlsx,xls',
            ]);

            Excel::import(new SiswaImport, $request->file('file'));

            return back()->with('success', 'Import data siswa berhasil!');
        } catch (\Exception $e) {
            Log::error('Import siswa gagal: ' . $e->getMessage());
            return back()->withErrors('Terjadi kesalahan saat mengimpor data siswa.');
        }
    }

    public function export()
    {
        return Excel::download(new SiswaExport, 'data_siswa.xlsx');
    }

    public function siswaLulus(Request $request)
    {
        $filterTahunAjaranId = $request->tahun_ajaran_id;
        $tahunAjaranLulus = TahunAjaran::where('status', 'lulus')->pluck('id');

        if ($filterTahunAjaranId) {
            $tahunAjaranLulus = $tahunAjaranLulus->filter(function ($id) use ($filterTahunAjaranId) {
                return $id == $filterTahunAjaranId;
            });
        }

        $data = Siswa::with(['kelas', 'tahunAjaran', 'user'])
                    ->whereIn('tahun_ajaran_id', $tahunAjaranLulus)
                    ->paginate(15);

        $kelasList = Kelas::all();
        $tahunAjaranList = TahunAjaran::where('status', 'lulus')->get();

        return view('admin.siswa.lulus', compact('data', 'kelasList', 'tahunAjaranList'));
    }
}